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Flow rate measuring apparatus

a technology of flow rate and measuring apparatus, which is applied in the direction of liquid/fluent solid measurement, volume metering, instruments, etc., can solve the problems of likely disconnection of wires, etc., and achieve the effect of reducing the occurrence of disconnection of wires, and suppressing deformation of the base main body due to pipe vibration

Active Publication Date: 2012-05-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a flow rate measuring apparatus that aims to reduce the occurrence of disconnection of wires due to vibration of a pipe. The apparatus includes a base made of resin, a plate with a flow rate detection element, a circuit board, and a cover made of resin. The apparatus also includes wires for electrically connecting the connector and circuit board, and deformation suppression means for connecting the flange and cover to each other to suppress deformation of the base main body due to vibration of the pipe. The technical effect of this invention is to reduce the occurrence of disconnection of wires due to vibration of the pipe.

Problems solved by technology

As a result, there is a problem in that fatigue disconnection of the wire is likely to occur.

Method used

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Experimental program
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Effect test

embodiment 1

[0039]FIG. 1 is a longitudinal sectional view of a flow rate measuring apparatus 1 according to Embodiment 1 of the present invention as viewed from an upstream side, FIG. 2 is a partially cutaway front view of the flow rate measuring apparatus 1 illustrated in FIG. 1, and FIG. 3 is an enlarged view of a principal part of the flow rate measuring apparatus 1 illustrated in FIG. 1.

[0040]An apparatus insertion hole 51 is provided to an intake pipe 50 of an internal combustion engine. The flow rate measuring apparatus 1 is inserted into the apparatus insertion hole 51 so as to be installed inside the intake pipe 50 having a cylindrical shape.

[0041]The flow rate measuring apparatus 1 includes a base 11, a plate 10, a flow rate detection element 2, a circuit board 5, and a cover 6. The plate 10 is connected to the base 11 on a surface along a flow direction of air corresponding to a fluid to be measured. The flow rate detection element 2 is provided on the plate 10 in an exposed manner an...

embodiment 2

[0074]FIG. 8 is an enlarged sectional view of a principal part of the flow rate measuring apparatus 1 according to Embodiment 2 of the present invention.

[0075]In Embodiment 2, the cover 6 is bonded to the base main body 32 by the thermosetting silicone adhesive, whereas the cover 6 is bonded to the inner wall surface 17a of the flange 17 by an epoxy adhesive having higher stiffness than that of the silicone adhesive after being cured.

[0076]The remaining configuration is the same as that of Embodiment 1.

[0077]In the flow rate measuring apparatus 1 having the above-mentioned configuration, the flange 17 and the cover 6 are connected by a bonding portion 24 corresponding to the deformation suppression means, which is formed of the cured epoxy adhesive having higher stiffness than that of the bonding portion 16 of Embodiment 1. Therefore, the base 11 and the cover 6 are more firmly connected to each other.

[0078]Thus, the amount of displacement of the base main body 32, the plate 10, and...

embodiment 3

[0086]FIG. 9 is an enlarged sectional view of a principal part of the flow rate measuring apparatus 1 according to Embodiment 3 of the present invention, and FIG. 10 is a partially cutaway front view of the flow rate measuring apparatus 1 illustrated in FIG. 9.

[0087]In Embodiment 3, a groove 27, which is to be filled with the epoxy adhesive, is formed in the cover 6 on the side closer to the flange 17 so as to extend in parallel to the inner wall surface 17a of the flange 17. A bonding rib 28, which is loosely inserted into the groove 27, is formed on the base main body 32.

[0088]A groove 25, which is to be filled with the silicone adhesive, is formed in the cover 6 on the side closer to the circuit board 5. The groove 25 is formed over an entire circumference along the enclosure portion 21 of the cover 6. A bonding rib 26, which is loosely inserted into the groove 25, is formed on a circumferential edge portion of the base main body 32, which surrounds the circuit board 5.

[0089]Furt...

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Abstract

Provided is a flow rate measuring apparatus which suppresses deformation of a base main body due to vibration of a pipe so as to be able to reduce occurrence of disconnection of wires due to the vibration of the pipe. The flow rate measuring apparatus includes a bonding portion (16) corresponding to a deformation suppression portion provided between an inner wall surface (17a) of a flange (17) of a base (11) and an outer circumferential wall surface (6a) of a cover (6) covering a circuit board (5), which is opposed to the inner wall surface (17a), for connecting the flange (17) and the cover (6) to suppress the deformation of a base main body (32) of the base (11) due to vibration of an intake pipe (50).

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a flow rate measuring apparatus for outputting a signal according to a flow rate, for example, to a flow rate measuring apparatus suitable for measuring an intake air flow rate of an internal combustion engine.[0003]2. Description of the Related Art[0004]Conventionally, the following flow rate measuring apparatus is known. The flow rate measuring apparatus is inserted into an apparatus insertion hole provided to an intake pipe so as to be installed therein to measure a flow rate of air passing through the intake pipe (see Japanese Patent Application Laid-open No. 2009-008619 (FIG. 1)).[0005]The flow rate measuring apparatus includes: a base made of a resin, which includes a base main body having a connector formed at a base end portion so as to project to the outside of the intake pipe, and a flange provided so as to radially extend from the base main body to be fitted into the apparatus...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01F1/56
CPCG01F1/6842G01F15/14G01F1/684G01F5/00
Inventor URAMACHI, HIROYUKITANIMOTO, KOJIARIYOSHI, YUJIKAWAI, MASAHIROHIDAKA, SHINICHIROKISHIKAWA, NAOYUKI
Owner MITSUBISHI ELECTRIC CORP